plan-exporter: add update script (#395108)

Author: wolfgangwalther

pkgs/by-name/pl/plan-exporter/package.nix

@@ -2,18 +2,25 @@
   lib,
   fetchFromGitHub,
   buildGoModule,
+  nix-update-script,
 }:
 buildGoModule rec {
   pname = "plan-exporter";
   version = "0.0.6";
+
   src = fetchFromGitHub {
     owner = "agneum";
     repo = "plan-exporter";
     tag = "v${version}";
     hash = "sha256-Csp57wmkDA8b05hmKbk1+bGtORFgNls7I01A0irTKao=";
   };
+
   vendorHash = null;
 
+  passthru = {
+    updateScript = nix-update-script { };
+  };
+
   meta = {
     description = "Query plan exporter for psql";
     homepage = "https://github.com/agneum/plan-exporter";